Lateral resolution depends on ______.

Lateral resolution depends on ______.

• A. Depth
• B. Echo amplitude
• C. Beam width
• D. Frequency

Answer: (C)

Lateral resolution is about distinguishing two reflectors that sit side by side in the image, and it depends on how narrow the ultrasound beam is in the lateral direction at the depth of interest. A narrower beam creates a smaller illumination spot, so two closely spaced objects produce separate echoes; a wider beam blends them together, reducing lateral resolution. Depth can affect the beam width due to divergence, and frequency mainly influences axial resolution and penetration, not the primary lateral-detail ability. Echo amplitude relates to how strong the return signal is (brightness) rather than how well two nearby structures can be separated.

Lateral resolution is about distinguishing two reflectors that sit side by side in the image, and it depends on how narrow the ultrasound beam is in the lateral direction at the depth of interest. A narrower beam creates a smaller illumination spot, so two closely spaced objects produce separate echoes; a wider beam blends them together, reducing lateral resolution.

Depth can affect the beam width due to divergence, and frequency mainly influences axial resolution and penetration, not the primary lateral-detail ability. Echo amplitude relates to how strong the return signal is (brightness) rather than how well two nearby structures can be separated.